ComAp IM-NT, Справочное руководство

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InteliMains
NT
, SW version 3.0
InteliMains-NT-BTB-3.0-Reference Guide.pdf,
©ComAp – June 2013
145
Related FW 3.0
Description The setpoint adjusts the delay for busL under- and overvoltage protections.
The thresholds for these protections are adjusted by setpoints
BusLeft >V
and BusLeft <V .
N
OTE
:
Although the resolution of this setpoint is 0.01s, in fact the adjusted delay is
rounded to the next higher multiple of the period of the mains voltage. The
period is either 0.02s for 50Hz systems or 0.0166s for 60Hz systems. E.g. if
the delay is set to 0.03s at 50Hz system the real delay will be 0.04s.
12.2.6.10 Setpoint: BusLfreq prot
Group BusL protect
Range [units] ENABLED, DISABLED [-]
Related FW 3.0
Description This setpoint enables or disables BusL frequency protection. For more
information on this protection see setpoints
BusLeft >f , BusLeft <f and
BusLeft f del .
N
OTE
:
If both voltage and frequency protections (see also setpoint BusLVolt prot )
are disabled there is no way for the controller to decide whether the busL is
healthy or not. In this case busL is considered healthy if there is any voltage.
12.2.6.11 Setpoint: BusLeft >f
Group BusL Protect
Range [units] BusLeft <f .. 150 [%]
Related FW 3.0
Description This setpoint adjusts the threshold level for the busL overfrequency
protection. The threshold is adjusted in % of the buses' system frequency
which is given by
Nominal Freq and its offset Nom frq offset .
The protection activates if the frequency in phase L3 gets over the threshold
for time longer than
BusLeft f del .
N
OTE
:
The busL overfrequency protection is History record type - for more
information on protection types please refer to alarm types section .